竖向近距离卸载对既有隧道影响的数值分析  

Numerical Analysis of the Influence of Unloading on an Existing Tunnel in Close Distance

作　　者：张丽娟[1] 孙巍[2] 谢明[2] 袁勇[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]上海市政工程设计研究总院,上海200092

出　　处：《地下空间与工程学报》2010年第A01期1408-1412,共5页Chinese Journal of Underground Space and Engineering

基　　金：国家"十一五"科技支撑计划:城市地下空间防灾减灾技术研究(2006BAJ27B04);地下通道明挖法施工对既有建构筑物的影响及变形控制关键技术研究上海市科委科技攻关计划;课题编号:072112011

摘　　要：城市地下工程临近已有建筑物施工中,既有建(构)筑物的结构安全已成为关注的重要问题之一。有效控制既有建(构)筑物的变形成了设计和施工中考虑的重点。本文以上海外滩通道工程上穿运营中的延安东路隧道为背景,采用三维数值分析的方法,评价上方卸载对近距离既有隧道的影响,并分析比较了采用不同施工措施情况下既有隧道的变形量,为设计和施工提供有益的参考。With the rapid development of the underground space engineering, more and more excavation projects were built above or adjacent to the existing tunnels in close distance. How to control the deformation of the existing tunnels is the key of the projects which should be resolved urgently. Based on the project of Shanghai Waitan Underground Passage built above the existing Yanan Road Tunnel, this paper presents a 3D numerical model to evaluate the influence of unloading on the tunnel considering the different measures adopted in design, such as the reinforcement of soil and excavation plans in terms of the lime - space effecting of the excavations. The results will provide valuable references to designs and constructions.

关 键 词：地下工程 隧道结构 数值分析 施工竖向卸载 

分 类 号：U451[建筑科学—桥梁与隧道工程]